That is very nice looking! I think color is a thing Smok does do really well. If you are using drop in coils in that tank, the mod should read them for you, no worries. For recommended wattages, well the coil usually prints it alongside the resistance on the side of the coil, which should give you some wattage ranges as a starting point, it's fine to be below above can and sometimes will shorten coil life. Don't forget to prime it.
If you are using a rebuildable, well, the tank is still going to read the resistance although lots of folks will use an ohm's reader first (I do, mainly because I hate leaking all over my expensive mod as I build it, but I want to say I think you have a drop in coil tank on there?
Anna